#173E7C#173E7C

#173E7C is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.114 H 259.5°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#173E7C
RGB	rgb(23, 62, 124)
HSL	hsl(217, 69%, 29%)
HSV	hsv(217, 81%, 49%)
CMYK	cmyk(81.5%, 50%, 0%, 51.4%)
CIE-LAB	lab(26.97, 10.65, -39.12)
CIE-LCH	lch(26.97, 40.55, 285.23°)
OKLab	oklab(37.38% -0.0209 -0.1124)
OKLCH	oklch(37.38% 0.114 259.5)
XYZ	xyz(5.7127, 5.0820, 19.7447)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E7C #7C5517

analogous

#17717C #173E7C #23177C

triadic

#173E7C #7C173E #3E7C17

tetradic

#173E7C #7C1771 #7C5517 #177C23

square

#173E7C #7C1771 #7C5517 #177C23

split-complementary

#173E7C #7C2317 #717C17

monochromatic

#050D1A #0D2448 #173E7C #2158B0 #3474D9

Accessibility & contrast

On white

10.41

#173E7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#173E7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E7C

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E7C	#FFFFFF	#000000	##FFFFFF
##173E7C	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B457E

Deuteranopia (green-blind)

#003B7B

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173e7c;
/* rgb */ color: rgb(23, 62, 124);
/* oklch */ color: oklch(37.4% 0.114 259.5);

Tailwind

colors: {
  custom: {
    50: '#6572a2',
    500: '#173e7c',
    950: '#000000',
  },
}

SCSS

$custom: #173e7c;
$custom-light: #6572a2;
$custom-dark: #000000;

JSON

{
  "hex": "#173e7c",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 124
  },
  "hsl": {
    "h": 216.832,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37378,
    "c": 0.11436,
    "h": 259.5
  },
  "luminance": 0.05083
}

Semantic roles & 50–950 ramp

primary

#173E7C

secondary

#B1843E

accent

#A83CEC

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06080F

muted

#7A7B7F

Preview Lab

Preview with #173E7C

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →